Question

the object dropped from aheight with initial veolcity zero strikes the ground with a velocity of 30m/s. how long does it take to reach the groung . also find maximum height travelled.( g=10m/s^2

Answer 1

v=√2gh
h=45m
v-u/a=t
t=3s

Answer 2

u=0
v^2-u^2=2as
v^2=2gh
30*30=2*10*h
h=45
v-u=at
30-0=10*t
t=3